Smart Bullet Path

In this undated time exposure photo provided by Sandia National Laboratories, a light-emitting diode, or LED, attached to a self-guided bullet at Sandia National Laboratories shows a bright path during a nighttime field test. The New Mexico-based Sandia National Laboratories announced Tuesday that its engineers have invented a bullet that directs itself to a target like a tiny guided missile and can hit a target more than a mile away. According to Sandia Labs engineers, the bullet twists and turns to guide itself toward a laser-directed point. Officials say it can make up to thirty corrections per second while in the air. (Sandia National Laboratories)